作者:Theodorus P. M. Goumans、Kaj van Alem、Gerrit Lodder
DOI:10.1002/ejoc.200700882
日期:2008.1
series of E or Z stereoisomeric α-R-substituted bromostyrenes (R = CH3, F or CN) in methanol yields E and/or Z stereoisomeric styrenes, which stem from the corresponding vinyl radicals. The results show that the α-Me vinyl radical is a rapidly equilibrating, bent structure, while the α-F vinyl radical is a stable bent species, in agreement with earlier thermal results. The α-CN vinyl radical is assigned
一系列 E 或 Z 立体异构 α-R 取代溴苯乙烯(R = CH3、F 或 CN)在甲醇中的光解产生 E 和/或 Z 立体异构苯乙烯,它们源自相应的乙烯基自由基。结果表明,α-Me 乙烯基自由基是一种快速平衡的弯曲结构,而 α-F 乙烯基自由基是一种稳定的弯曲物质,与早期的热结果一致。根据作为温度函数的立体化学结果,α-CN 乙烯基自由基被指定为快速反转弯曲而不是线性物质。乙醚中 α-C(H)=O 系统的立体化学数据表明稳定的弯曲乙烯基自由基作为产物形成物质。结论得到了量子化学计算的支持。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)